First timer. Hello to all. My name is RedGeese and I have a 1985 corvette

Original owner, last year put quite a bit into restoration. Car has run flawlessly until last week. Drove it for about one hour, stopped for about three hours before getting back on road again. When I got to about 55 mph, felt sputtering. First thing that came to mind, bad gas? Filled up day before but why not a problem sooner? Sputtered at less than 55 into town/ my house not before having to pull over a couple times, car stalled but started immediately. I'm no mechanic but first thoughts 1) bad fuel 2)bad fuel filter 3) clogged injector (tuned port injection system). My friend says it sound potentially electrical to him. The fuse panel has two fuses for electronic fuel injector noted on it. Possibility? Any advice or point me in the right direction would be much appreciated